Regulators from around the world took to microphones all over Washington this weekend to deliver a blunt message to executives at the largest banks: stop whining, particularly about capital requirements.

"If some institutions feel pressure today, it's because they have done too little for too long rather than being asked to do too much too soon," said Mark Carney, who leads Canada's central bank and chairs the Bank for International Settlements' Committee on the Global Financial System.

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